Child abuse, like domestic abuse, happens behind the most expensive, salubrious of doors and we need to face up to this. It was the complacent conviction that it could not happen in a nice middle-class suburb that meant Fritzel could go about his hideous double life in Austria with his family in the cellar, unnoticed for so long. At least Fritzel’s house looks like a grim prison-block that allows us to set him apart and view him as a freak. Took, on the other hand, lived in a beautiful, spacious home in Chelsea, surrounded by paintings and books, and was able to blind those around him with the sheer weight of his glamour and assured social status. Many paedophiles can. It is as if a man of intelligence and achievement cannot take the intellectual leap into such darkness. But he clearly can — and has.